Fatal error after updating! Please Help

Hi,
after updating I had many problems, I fixed a few of them by editing and updating Illdy-companion plugin, but I have no idea on how to fix this one:

Fatal error: Uncaught Error: Class 'Epsilon_Editor_Custom_Control' not found in /home5/comitat3/public_html/wp/wp-content/plugins/illdy-companion/illdy-companion.php:345 Stack trace: #0 /home5/comitat3/public_html/wp/wp-includes/class-wp-hook.php(298): illdy_companion_customize_register(Object(WP_Customize_Manager)) #1 /home5/comitat3/public_html/wp/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #2 /home5/comitat3/public_html/wp/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /home5/comitat3/public_html/wp/wp-includes/class-wp-customize-manager.php(734): do_action('customize_regis...', Object(WP_Customize_Manager)) #4 /home5/comitat3/public_html/wp/wp-includes/class-wp-hook.php(298): WP_Customize_Manager->wp_loaded('') #5 /home5/comitat3/public_html/wp/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #6 /home5/comitat3/public_html/wp/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #7 /home5/comitat3/public_html/wp/wp-settings.php(470): do_action('wp_loaded') in /home5/comitat3/public_html/wp/wp-content/plugins/illdy-companion/illdy-companion.php on line 345

could someone please help me?
Thank you !
sam